modified my 8297 but have a problem

[darksheep]

Hi their all , i have modified my lego 8297 set and added a drive motor and a steering one but every time i drive the model i hear gear grating coming from the back differential i followed a guide on a brick shelf gallery and copyed this guys idea but cant get it to work and ideas ?

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=358966

Thanks for the help guys.

[Siegfried]

Did you use the clutch as recommended but not illustrated? I've tried something similar with another set and it's hard to make work. (I didn't use clutches as I didn't have one spare at the time.)

[darksheep]

Did you use the clutch as recommended but not illustrated? I've tried something similar with another set and it's hard to make work. (I didn't use clutches as I didn't have one spare at the time.)

Yes for the steering part i used the clutch thats the only part i saw that the pointed out the clutch needed to be used .